
impulse
词源
源自拉丁语 'impulsus',意为‘推动’或‘驱使’,由 'in-'(向内)和 'pellere'(推动)组成。
noun
❶ 一种突然的、强烈的欲望或冲动,通常难以控制,促使人们立即采取行动。
“She felt an impulse to buy the dress even though it was expensive.”
(她突然有种冲动想买下那条裙子,尽管它很贵。)
“He acted on impulse and quit his job without thinking.”
(他一时冲动,没多想就辞职了。)
❶ 物理学中指力的短暂作用,通常表现为物体动量的变化。
“The rocket's engines provided the necessary impulse for liftoff.”
(火箭引擎提供了起飞所需的冲力。)
“A sudden impulse from the collision changed the car's direction.”
(碰撞产生的突然冲力改变了汽车的方向。)
verb
❶ 推动或促使某人做某事,通常指突然或强烈的动机。
“His curiosity impulsed him to open the mysterious box.”
(好奇心驱使他打开了那个神秘的盒子。)
“Fear can impulse people to make irrational decisions.”
(恐惧会促使人们做出不理性的决定。)
常见短语
on impulse — 指未经深思熟虑,因一时冲动而做出的行为或决定。
“He bought the expensive watch on impulse.”
(他一时冲动买下了那块昂贵的手表。)
impulse buy — 指未经计划,因一时冲动而购买的商品。
“The candy near the checkout counter is designed to encourage impulse buys.”
(收银台附近的糖果是为了鼓励冲动消费而设计的。)